Q waves

Question 1

Small Q waves are normal in leads

Answer 1

I
VL
V6
(septal Q waves)

Question 2

A Q wave in lead III but not in VF is likely to be

Answer 2

normal…even when associated with an inverted T wave

Question 3

How is it possible for Q wave abnormality to disappear?

Answer 3

repeat the EKG WITH patient holding their breath.

Question 4

Q waves greater than 1 small square in width and at least 2 mm in depth indicate a

Answer 4

MI

Question 5

The leads where the Q waves appear give some indication of

Answer 5

the part of the heart that has been damaged

Question 6

Infarction of the anterior wall of the left ventricle causes a Q wave in the leads

Answer 6

v2-v4 or v5

the leads that look at the front of the heart - anterior

Question 7

If the infarction involves the anterior and lateral surfaces of the heart, Q waves will be present in

Answer 7

V3 and V4 ……and…I, VL and V5-V6 (leads that look at the lateral surface of the hear)

Question 8

Infarctions of the inferior surface of the heart cause Q waves in the leads that look at the heart from below

Answer 8

III and AVF

Question 9

Once a Q wave develops, it is usually

Answer 9

permanent

Question 10

Can a Q wave give indication of the age of an infarction?

Answer 10

No, it does not give any indication of the age of an infarction.

Question 11

In the presence of a PE, there may be a Q wave in lead

Answer 11

III